User`s manual

Western Reserve Controls, Inc. 1782-JDC User’s Manual
32
Parameter Instances for Table A-10
1. Serial Character Format: The character frame format.
2. Baud Rate: The baud rate of the ASCII channels. Valid baud rates are 1200, 2400, 4800,
9600, 19.2k, and 38.4k baud.
3. End-of-Text Character: The (printable or non-printable) byte character (value of 0-255) that
signifies that the last character in a string of ASCII characters has been reached. The JDB will
not return to the Master any additional characters after the EOT character, or any characters
in the string after the maximum character count is reached.
4. Transmit Delimiter: The (printable or non-printable) byte character (value of 0-255) that
signifies that the last character in a string of ASCII characters has been reached. The JDB will
not transmit to the device any additional characters after the transmit delimiter character, or
any characters in the string after the maximum character count is reached.
5. Maximum Number of ASCII Input Characters: The maximum number of ASCII characters
expected to be input from the serial device connected to this port. The end-of-string, or end-
of-text, character is included in this count. (A “0” implies the port does not receive data from
the external device or that no device exists.)
6. Maximum Number of ASCII Output Characters: The maximum number of ASCII characters
that will be sent from the host to the serial device connected to this port. The end-of-string, or
end-of-text, character is included in this count. (A “0” implies the port does not output data to
the external device or that no device exists.)
7. DeviceNet Baud Rate: Allows a selection of baud rates on the DeviceNet link.
8. Pad Mode: When enabled the pad mode will pad the serial receive data with the specified
pad character. When disabled, the JDC will only return the receive data, saving some network
bandwidth. The default is enabled. Pad mode must be enabled for Allen-Bradley
Scanners due to their inability to handle short poll responses.
9. Pad Character: The character that the pad mode uses to lengthen the poll response with.
10. Swap Bytes: Exchange byte positions on word or long integer boundaries for both receive
and transmitted messages. This is included for capability with Allen Bradley PLC’s such as the
SLC500 or Control Logic.